uni·​cel·​lu·​lar | \ ˌyü-ni-ˈsel-yə-lər How to pronounce unicellular (audio) \

Definition of unicellular

: having or consisting of a single cell unicellular microorganisms

Examples of unicellular in a Sentence

Recent Examples on the Web And even today, there are far more unicellular organisms than multicellular ones on the planet. Quanta Magazine, 22 Sep. 2021 Biophysically, this suggests that a unicellular organism can evolve a way to maintain the physical integrity of a larger size. Quanta Magazine, 22 Sep. 2021 Jennings, too, as early as the turn of the 20th century, sensed and believed that the behavioral workings of animals were often elaborations on systems already in place in unicellular life. Jennifer Frazer, Scientific American, 28 May 2021 Before long, most of our food will come neither from animals nor plants, but from unicellular life. Aric Jenkins, Fortune, 9 Jan. 2020 The beetle is so tiny that it is dwarfed by some unicellular organisms, which are usually microscopic. Lauren M. Johnson, CNN, 25 Oct. 2019 How did life make this spectacular leap from unicellular simplicity to multicellular complexity? Quanta Magazine, 29 July 2014 His results showed that the region seethed with mats of photosynthesizing, unicellular life forms long before the Cambrian explosion. Peter Byrne, Quanta Magazine, 24 Apr. 2014 Red tides are caused by a type of unicellular algae known as a dinoflagellate. David Grossman, Popular Mechanics, 14 Aug. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'unicellular.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of unicellular

1858, in the meaning defined above

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The first known use of unicellular was in 1858

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Dictionary Entries Near unicellular



unicellular animal

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Last Updated

17 Oct 2021

Cite this Entry

“Unicellular.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unicellular. Accessed 26 Oct. 2021.

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More Definitions for unicellular


uni·​cel·​lu·​lar | \ ˌyü-ni-ˈsel-yə-lər How to pronounce unicellular (audio) \

Medical Definition of unicellular

: having or consisting of a single cell unicellular microorganisms

Other Words from unicellular

unicellularity \ -​ˌsel-​yə-​ˈlar-​ət-​ē How to pronounce unicellular (audio) \ noun, plural unicellularities


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